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.Dd September 27, 2024
.Dt GETRLIMITUSAGE 2
.Os
.Sh NAME
.Nm getrlimitusage
.Nd Query usage of the current process' limited resources
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In sys/resource.h
.Ft int
.Fn getrlimitusage "unsigned which" "int flags" "rlim_t *res"
.Sh DESCRIPTION
The
.Nm
system call allows the process to query current consumption of the resources
limited by the
.Xr setrlimit 2
call.
.Pp
The
.Fa which
argument specifies the resource, same as for
.Xr getrlimit 2
and
.Xr setrlimit 2
calls, see their man page for the list of enforced resource types.
.Pp
The
.Fa flags
argument modifies the behavior of the call in the following ways:
.Bl -tag -width GETRLIMITUSAGE_XXXXXX
.It Va GETRLIMITUSAGE_EUID
Query the resource usage for user identified by effective UID of the process,
instead of the real UID (which is default for accounting).
.El
.Sh RETURN VALUES
.Rv -std
.Sh ERRORS
The
.Fn getrlimitusage
system call will fail if:
.Bl -tag -width Er
.It Bq Er EFAULT
The address specified for
.Fa res
is invalid.
.It Bq Er EINVAL
The resource specified to
.Fn getrlimitusage
in the
.Fa which
argument is unknown.
.It Bq Er ENXIO
The resource specified to
.Fn getrlimitusage
in the
.Fa which
argument is not accounted, but only enforced in specific situations.
Examples of such resources are
.Va RLIMIT_FSIZE
and
.Va RLIMIT_CORE .
.El
.Sh SEE ALSO
.Xr procstat 1 ,
.Xr getrlimit 2 ,
.Xr setrlimit 2
.Sh HISTORY
The
.Fn getrlimitusage
system call appeared in
.Bx 15.0 .
